The ESET Offline Update feature allows you to update virus signature databases and detection engine components on a computer that has no internet connection (or a very limited/unreliable one).
Some sophisticated malware (like ransomware or rootkits) will deliberately corrupt your TCP/IP stack, disable your network card drivers, or hijack DNS settings to block you from reaching ESET’s update servers. To clean the machine, you first need the latest signatures—but you can’t get online. Using a clean "donor" PC to download the offline update and transferring it via USB is the industry standard solution. eset offline update
Using offline updates requires strict discipline. A single infected USB drive can compromise your air-gapped network. The ESET Offline Update feature allows you to